
@tailwind base;
@tailwind components;
@tailwind utilities;


:root {
  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;

  color-scheme: light dark;
  color: rgba(255, 255, 255, 0.87);
  background-color: #242424;

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  font-weight: 500;
  color: #646cff;
  text-decoration: inherit;
}
a:hover {
  color: #535bf2;
}

body {
  margin: 0;
  display: flex;
  place-items: center;
  min-width: 320px;
  min-height: 100vh;
}

h1 {
  font-size: 3.2em;
  line-height: 1.1;
}

button {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  background-color: #1a1a1a;
  cursor: pointer;
  transition: border-color 0.25s;
}
button:hover {
  border-color: #646cff;
}
button:focus,
button:focus-visible {
  outline: 4px auto -webkit-focus-ring-color;
}

.card {
  padding: 2em;
}

#app {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem;
  text-align: center;
}

@media (prefers-color-scheme: light) {
  :root {
    color: #213547;
    background-color: #ffffff;
  }
  a:hover {
    color: #747bff;
  }
  button {
    background-color: #f9f9f9;
  }
}

/* 全局工具类：解决布局和连接线基础样式 */
.device-shadow {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}
.connection-line {
  background-color: #165DFF; /* 实线：主色 */
  z-index: 10; /* 线条在设备下方 */
}
.connection-line-dashed {
  background: repeating-linear-gradient(
    to right,
    #94A3B8, #94A3B8 4px, transparent 4px, transparent 8px
  ); /* 虚线：辅助色 */
  z-index: 10;
}
.topology-grid {
  background-image: url('');
  pointer-events: none; /* 网格不遮挡交互 */
}